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File indexing completed on 2026-11-07 10:11:39
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file celeritas/optical/surface/model/SurfaceInteraction.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include "corecel/math/ArrayUtils.hh" 0010 #include "corecel/math/SoftEqual.hh" 0011 0012 namespace celeritas 0013 { 0014 namespace optical 0015 { 0016 //---------------------------------------------------------------------------// 0017 /*! 0018 * Result of a surface physics interaction. 0019 */ 0020 struct SurfaceInteraction 0021 { 0022 //! Interaction result category 0023 enum class Action 0024 { 0025 absorbed, //!< Killed on the surface 0026 reflected, //!< Reflected into original material 0027 refracted, //!< Refracted into new material, with change 0028 transmitted //!< Transmitted into new material without change 0029 }; 0030 0031 Action action{Action::absorbed}; //!< Flags for interaction result 0032 Real3 direction; 0033 Real3 polarization; 0034 0035 // Return an interaction representing an absorbed photon 0036 static inline CELER_FUNCTION SurfaceInteraction from_absorption(); 0037 0038 // Return an interaction representing a transmitted photon 0039 static inline CELER_FUNCTION SurfaceInteraction from_transmission(); 0040 0041 //! Whether data is assigned and valid 0042 CELER_FUNCTION bool is_valid() const 0043 { 0044 return action == Action::absorbed || action == Action::transmitted 0045 || (is_soft_unit_vector(direction) 0046 && is_soft_unit_vector(polarization) 0047 && is_soft_orthogonal(direction, polarization)); 0048 } 0049 }; 0050 0051 //---------------------------------------------------------------------------// 0052 // INLINE DEFINITIONS 0053 //---------------------------------------------------------------------------// 0054 /*! 0055 * Construct a surface interaction for an optical photon absorbed on the 0056 * surface. 0057 */ 0058 CELER_FUNCTION SurfaceInteraction SurfaceInteraction::from_absorption() 0059 { 0060 SurfaceInteraction result; 0061 result.action = Action::absorbed; 0062 return result; 0063 } 0064 0065 //---------------------------------------------------------------------------// 0066 /*! 0067 * Construct a surface interaction for an optical photon transmitted through 0068 * the surface without change. 0069 */ 0070 CELER_FUNCTION SurfaceInteraction SurfaceInteraction::from_transmission() 0071 { 0072 SurfaceInteraction result; 0073 result.action = Action::transmitted; 0074 return result; 0075 } 0076 0077 //---------------------------------------------------------------------------// 0078 } // namespace optical 0079 } // namespace celeritas
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